Yeah, different hardware is designed for different use cases and generally won't work as well for other use cases, which is also why desktops seldom make for great NAS servers (their fans will also fail from constant use, plus their design spec is for much higher power usage so they have a lot more power waste even if trottled down).

That said my ASUS EEE PC lasted a few years on top of a cabinet in my kitchen (which is were the Internet came into my house so the router was also there) with a couple of external HDDs plugged in, and that's a bit of a hostile environment (because some of the particulates from cooking, including fat, don't get pulled out and end up accumulating there).

At the moment I just have a Mini-PC on my living room with a couple of external HDDs plugged in that works as NAS, TV Media Box and home server (including wireguard VPN on top of a 1Gbps connection, which at peak is somewhat processor intensive). It's an N100 and the whole thing has a TDP of 15W so the fan seldom activates. So far that seems to be the best long term solution, plus it's multiple use unlike a proprietary NAS. It's the some of the best €140 (not including the HDDs) I've ever spent.